Well I didn't really have any strange teachers in Elementary school. I had the coolest teachers in 3rd, 4th, and 5th grade though!
In 6th grade I had this English teacher that I hated so much, and she always yelled at me for some reason!

She would always say "Don't make me drop kick you all the way to the H-E-B" H-E-B is a local Grocery store, by the way.
In 7th grade I had the craziest science teacher, Mr. Hook. During Sex-Ed he was talking about sperm going into the egg, and he started acting out the role. He leaned over and started bumping into the overhead projector (egg) acting like a sperm trying to enter an Egg. It was so hilarious, that was a fun class. One time in that class this kid passed out, but the teacher thought he was goofing off, so he started bitching, but saw the kid had fallen out of his chair. So he woke him up, took him out in the hall where no one could really see, but I was able to see. And as he was talking to the kid in the hall, he just passed out again, falling on the floor.
In 8th grade we used to always lock my History teacher in her office. She was new, early 20's and was really really cool, so we proceeded to make her first year hell. And she just laughed with us, as we piled up desks around her office door, and she attempted to CLIMB out.
In 9th grade, we had a Chemistry substitute for about a month or two, who was this old creep. He would wash his hands with rubbing alchohol, and was the worst teacher I have ever had. But it was fun because we would just sit and play game boy or goof off as he attempted to teach us. It was a fun time, we did absolutely nothing! Eventually he just walked out on our class and never came back, the principle wasn't too happy with us....